Design a Logo for an iPhone app

Contest Brief

Haildrop is a to-do & note-taking app. It's inspired by rain and hailstones so the logo (icon) must be connected to these two things.
The logo must be simple, eye-catching and very engaging. It would be very nice if you could make it in iOS 7 style.
Preferable colours: light blue and white. /This doesn't mean that you can not experiment with other colours/

The Icon should NOT include:
-clouds
-the app name, but you can try with the letter "h"

Looking for freelancers passionate about their work.
Feel free to contact me.